Eskişehir Province (Turkish: Eskişehir ili) is a province in northwestern Turkey. Its adjacent provinces are Bilecik to the northwest, Kütahya to the west, Afyon to the southwest, Konya to the south, Ankara to the east, and Bolu to the north. The provincial capital is Eskişehir. Most of the province is laid down in Central Anatolia Region. Northern parts of Mihalıççık district and ones of Mihalgazi and Sarıcakaya of her remained in Black Sea Region and Han one of her remained in Aegean Region.

Eskişehir is an old, culturally developed province of Turkey. It has a population of 755,427. Eskişehir has 2 universities, Eskişehir Osmangazi University ESOGU, and Anadolu Üniversitesi, which is the largest university in Turkey and which has some branch offices in Europe.

Eskişehir province is divided into 14 districts two of which are actually included in the greater municipality of Eskişehir (shown in boldface letters).

Eskişehir's population has a high literacy level for Turkey at about 99%. Many universities and military installations are located in and around the city. Turkish technical students are concentrated in the Eskişehir universities. Infrastructural problems have been partially solved in 2004 with the construction of a tram system.

Eskişehir (pronounced [esˈciʃehiɾ]; Turkish: eski "old", şehir "city") (Latin: Dorylaeum; Ancient Greek: Δορύλαιον, Dorýlaion) is a city in northwestern Turkey and the capital of the Eskişehir Province. According to the 2009 census, the population of the city is 631,905. The city is located on the banks of the Porsuk River, 792 m above sea level, where it overlooks the fertile Phrygian Valley. In the nearby hills one can find hot springs. The city is 233 km (145 mi) to the west of Ankara, 330 km (205 mi) to the southeast of Istanbul and 78 km (48 mi) to the northeast of Kütahya. Known as a university town, both Eskişehir Osmangazi University and Anadolu University (which has one of the largest student enrollments in the world) are based in Eskişehir. The province covers an area of 2,678 km² (1,034 sq mi).

The name Eskişehir literally means Old City in Turkish; indeed, the city was founded by the Phrygians in about 1000 BOT. Many Phrygian artifacts and sculptures can still be found in the city's archeological museum. There is also a museum of meerschaum stone, whose production remains still notable, used to make high quality meerschaum pipes. In the fourth century AD the city moved about ten km northeast, from Karacahisar to Şehirhöyük.